Preheat grill, indoor grill pan, or heavy frying pan to medium high.
Coat a medium-sized pan with cooking spray.
Sauté bell peppers 20 minutes over medium low.
Mix ketchup ingredients in a small bowl; set aside.
Combine turkey with Old Bay seasoning, cayenne pepper, and salt in a medium-sized bowl.
Form into 4 patties.
Grill patties 4 minutes on each side or until juices run clear.
Remove from heat and top each burger with a slice of cheese.
Toast English muffins; spread with ketchup.
Place each burger on a muffin; top with sautéed peppers.
